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The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons in nu_tau charged current interactions. The evidence of nu_mu -> nu_tau appearance has been previously reported with three nu_tau candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth nu_tau candidate event, with the tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analysed events and the low background, nu_mu -> nu_tau oscillations are established with a significance of 4.2sigma.
Details
Subject
Title
Observation of nu_tau appearance in the CNGS beam with the OPERA experiment
Author
OPERA Collaboration; Agafonova, N; Aleksandrov, A; Anokhina, A; Aoki, S; Ariga, A; Ariga, T; Asada, T; Bender, D; Bertolin, A; Bozza, C; Brugnera, R; Buonaura, A; Buontempo, S; Buttne, B; Chernyavsky, M; Chukanov, A; Consiglio, L; D'Ambrosio, N; De Lellis, G; De Serio, M; Del Amo Sanchez, P; A Di Crescenzo; D Di Ferdinando; N Di Marco; Dmitrievski, S; Dracos, M; Duchesneau, D; Dusini, S; Dzhatdoev, T; Ebert, J; Ereditato, A; Fini, R A; Fukuda, T; Galati, G; Garfagnini, A; Giacomelli, G; Goellnitz, C; Goldberg, J; Gornushkin, Y; Grella, G; Guler, M; Gustavino, C; Hagner, C; Hara, T; Hayakawa, T; Hollnagel, A; Hosseini, B; Ishida, H; Ishiguro, K; Jakovcic, K; Jollet, C; Kamiscioglu, C; Kamiscioglu, M; Katsuragawa, T; Kawada, J; Kawahara, H; Kim, J H; Kim, S H; Kitagawa, N; Klicek, B; Kodama, K; Komatsu, M; Kose, U; Kreslo, I; Lauria, A; Lenkeit, J; Ljubicic, A; Longhin, A; Loverre, P; Malenica, M; Malgin, A; Mandrioli, G; Matsuo, T; Matveev, V; Mauri, N; Medinaceli, E; Meregaglia, A; Meyer, M; Mikado, S; Miyanishi, M; Monacelli, P; Montesi, M C; Morishima, K; Muciaccia, M T; Naganawa, N; Naka, T; Nakamura, M; Nakano, T; Nakatsuka, Y; Niwa, K; Ogawa, S; Okateva, N; Olshevsky, A; Omura, T; Ozaki, K; Paoloni, A; Park, B D; Park, I G; Pasqualini, L; Pastore, A; Patrizii, L; Pessard, H; Pistillo, C; Podgrudkov, D; Polukhina, N; Pozzato, M; Pupilli, F; Roda, M; Roganova, T; Rokujo, H; Rosa, G; Ryazhskaya, O; Sato, O; Schembri, A; Shakiryanova, I; Shchedrina, T; Sheshukov, A; Shibuya, H; Shiraishi, T; Shoziyoev, G; Simone, S; Sioli, M; Sirignano, C; Sirri, G; Spinetti, M; Stanco, L; Starkov, N; Stellacci, S M; Stipcevic, M; Strolin, P; Takahashi, S; Tenti, M; Terranova, F; Tioukov, V; Tufanli, S; Umemoto, A; Vilain, P; Vladimirov, M; Votano, L; Vuilleumier, J L; Wilquet, G; Wonsak, B; Yoon, C S; Yaguchi, I; Yoshimoto, M; Zemskova, S; Zghiche, A
arXiv.org; Ithaca
Publication year
2014
Publication date
Aug 27, 2014
Section
High Energy Physics - Experiment
Source
arXiv.org
Place of publication
Ithaca
Country of publication
United States
University/institution
Cornell University Library arXiv.org
Publication subject
e-ISSN
2331-8422
Source type
Working Paper
Language of publication
English
Document type
Working Paper
Publication history
Online publication date
2014-11-11
Milestone dates
2014-07-13 (Submission v1); 2014-08-27 (Submission v2)
Publication history
First posting date
11 Nov 2014
ProQuest document ID
2084394936
Document URL
https://www.proquest.com/working-papers/observation-nu-tau-appearance-cngs-beam-with/docview/2084394936/se-2?accountid=208611
Full text outside of ProQuest
Copyright
© 2014. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
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2019-04-16
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